tel = {'jack': 4098 , 'sape': 4139}
tel['guido'] = 4127
print(tel)
print(tel['jack'])

del tel['sape']
print(tel)
tel['irv'] = 4128
print(tel)
print(list(tel))
print(sorted(tel))
print(dict([('sape',4139) , ('guido',4127),('jack',4098) ]))
dict1 = {x: x**2 for x in {2,4,6}}
print(dict1)
dict2 =dict(sape=333,guido=4128,jack=4098)
print(dict2)